Thread-cutter.



J. W. GOWELL.

THREAD CUTTER.

APPLIGATION FILED JAN. 21, 191] Patented Oct. 10

2 SHEETS-SHEET 1.

J. W. GOWELL.

THREAD CUTTER.

APPLICATION FILED JAN. 21, 1911.

1 ,OO5,60 4, Patented Oct. 10, 1911.-

JOHN W. COWELL, OF LOS ANGELES, CALIFORNIA.

THREAD-CUTTER.

Specification of Letters Patent.

' Patented Oct. 10, 1911.

Application filed January 21, 1911. Serial No. 603,891.

To all whom it may concern:

Be it known that 1, JOHN W. CownLL, a' citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in Thread-Cutters,of which the following is a specification.

This invention relates to thread cutters and one of the principalobjects of the invention is the provision of a simple and inexpensivedevice whereby threads may be cut upon rods of difierent diameters andwith threads of different pitch.

A further object of the invention is the provision of a device of thischaracter hav ing a plurality of jaw surfaces with cutting dies formedtherein and means for holding the jaw surfaces together so that the diesin each side will coact with each other.

A still further object of the invention is the provision of a device ofthis character having a plurality of aw surfaces together with means forholding the aw surfaces in coacting relation and also in adjustingrelation whereby rods, bolts, pipes, etc. of different diameters may bereadily threaded.

Further objects of the invention will appear as the following specificdescription is read in connection with the accompanying drawings, whichform a part of this application, and in which: i I

Figure 1 is a side elevation. Fig. 2 is a section taken on the line 22of Fig. 1. Fig. 3 is a similar section taken on the line 33 of Fig. 1.Fig. 1 is an edge View. Fig. 5 is a side elevation of a modified form.Fig. 6 is an edge view thereof. Fig. 7 is a detail side elevation of oneof the members shown in Fig. 5.

Referring more particularly to the drawings, l and 2 represent theseparate members of the device which are connected together at one endby means of a pair of pivoting plates 3 and the rivets 1 and 5. Themember 1 is provided with an elongated shank or handle 6 and the lowerend of the member 2 is provided with a cylindrical headed boss 7 uponwhich is pivoted an arm 8 having a right angular extension 9 adapted tosurround the member 1. Threaded into the extension 9 is a set screw 10which engages the shank of the member 1 and holds the separate partstogether. The arm 8 is mounted upon the boss 7 so as to swing in acomplete circle whereby it may be utilized for locking the partstogether in either normal or reverse positions.

The members 1 and 2 have their opposite edges, between the plates 3 andthe boss and shank, provided with a plurality of different sized diefaces 11 and these opposite die faces are adapted to be held in coactingrelation with each other by the arm 8 and by means of alinement pins 12secured to each member and adapted to enter apertures 13 in the oppositeside of the opposite member. The rivet 5 is revolubly mounted in theplates and in the member 1 and is provided in its center or upon theportion upon which the member 1 is journaled with a cam 14 which isadapted to be turned by a sliding latch 15 carried by the front plate 3and engaging suitable notches 16 formed in the enlarged head 17 of therivet 5. This cam regulates the distance between the separate members 1and 2 at their pivotal end and the set screw 10 may be adjusted to limitthe separating movement of the opposite end of said members so thatseveral different sized pipes may be cut by the same die with the samepitch of thread.

In the modified form illustrated in Figs. 5 to 7 a pair of members 18and 19 are shown having coacting die faces 20 arranged in opposite sidesthereof. These die faces are secured in the members in the form ofplates 21 which have one end beveled off and wedged, as shown at 22 and23 in Figs. 7 and 6 respectively, so as to engage the V-shaped undercutshoulder 24. The opposite end of the members 21 is provided with anaperture 25 through which is passed a locking screw 26 adapted to enterthe member to which the plate is secured. The joint between the member21 and the frame 18 at the end where the screw 26 is used must besomewhat loose in order that the wedged and beveled end of the member 21may be inserted. WVhile the member 19 has not been shown as constructedin the manner just described, it

will be clearly understood that it may be so constructed if desirable.The members 18 and 19 are connected together in the manner described inFigs. 1 to 4 and the member 18 is provided with longitudinal handleextensions 27 at each end which are secured to the member 18 by means ofa bolt 28. When it is desired to adjust the members 1 and 2 or 18 and 19the arm 8 is released from the shank and turned either at right anglesor in a plane parallel with the member to which it is attached and thearm to which it is attached is turned upon its rivet 5 until the catch15 comes into register with a notch 16 farther around upon the head 17.The member 2 is then moved back into cooperating position with themember 1, thus rotating the cam 1A to force the members 1 and 2 fartherapart. This catch 15 also acts to lock the rivet or pin 5 from rotation.The members are made parallel by adjusting the set screw 10. hen it isdesired to renew any of the parts the rivets 4: or 5 may be removed andif the part 2 is worn a new part may be placed between the plates 3. Ifthe plates 21 are worn the set screw 25 may be removed and the platelifted at that end and removed from the socket in which it is seated anda new plate substituted there- The device may be used for threading anybolt, pipe or rod and may also be used for cleaning old threads.

Having thus described the invention, what I claim as new is 1. A deviceof the class described comprising a pair of members having coacting diefaces on opposite sides, a pivotal connection for one end of saidmembers, and means including a part of said pivotal connection forregulating the separation of said members.

2. A device of the class described comprising a pair of members havingcoacting die faces on opposite sides, a pivotal connection for one endof said members, means including a part of said pivotal connection forregulating the separation of said members, together with adjustablemeans for holding the members in operative parallel relation.

3. A device of the class described comprising a pair of members havingcoacting die faces on opposite sides thereof, means for pivoting saidmembers together at one end, whereby either side of said members may beused together, means including a part of the pivoting means forregulating the separation of said members, and a swinging clamping armcarried by one of the members and adapted to lock with the other memberto secure the members in parallelism.

4;. A device of the class described comprising a pair of members havingcoacting die faces on opposite sides thereof, a pair of pivoting plates,means passing through said plates and through said members for pivotallyconnecting said members together, one of said connecting means having acam to engage its associated member, means carried by one of the platesfor operating said cam to adjustably control the separation of saidmembers, and a swinging clamping arm carried by one of the members andadapted to adjustably engage the opposite member to lock said members inparallel relation.

In testimony whereof I afiiX my signature in presence of two witnesses.

JOHN WV. COWVELL. WVitnesses:

L. O. =VVooDs, R. W. CLAPP.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

